int sem_timedwait(sem_t *restrict sem, const struct timespec *restrict at)
{
+ pthread_testcancel();
+
+ if (!sem_trywait(sem)) return 0;
+
+ int spins = 100;
+ while (spins-- && sem->__val[0] <= 0 && !sem->__val[1]) a_spin();
+
while (sem_trywait(sem)) {
int r;
a_inc(sem->__val+1);
a_cas(sem->__val, 0, -1);
- r = __timedwait(sem->__val, -1, CLOCK_REALTIME, at, cleanup, sem->__val+1, 0);
- a_dec(sem->__val+1);
- if (r) {
+ pthread_cleanup_push(cleanup, (void *)(sem->__val+1));
+ r = __timedwait_cp(sem->__val, -1, CLOCK_REALTIME, at, sem->__val[2]);
+ pthread_cleanup_pop(1);
+ if (r && r != EINTR) {
errno = r;
return -1;
}